Viktor Vodolatsky hit back at Trump's recent announcement about moving two U.S. nuclear submarines, saying his country has better ones.

L ONDON -- Ukrainian President Volodymyr Zelenskyy's top adviser urged the U.S. to "strangle" Russia's economy by imposing secondary sanctions on Moscow's trading partners, as the White House push for a ceasefire appears to languish.

U.S. President Donald Trump has given Russian President Vladimir Putin a new deadline to end the war in Ukraine.